Huawei WCDMA Radio Network Mobility Counter and KPI

HUAWEI TECHNOLOGIES CO., LTD.

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HUAWEI Confidential

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WCDMA Mobility Counter System and KPI

ISSUE 1.0

HUAWEI TECHNOLOGIES CO., LTD. Page 2HUAWEI Confidential

� WCDAM handover can be divided into different categories.

� Different counters and KPI are used for different handover.


� Upon completion of this course, you will be able to:

�Know different handover counter system

�Know different handover KPI


Mobility Counter and KPI System

� Soft handover

� Softer handover

� Hard handover

� Inter-frequency hard handover

� Intra-frequency hard handover

� Inter RAT handover

� Inter-RAT CS handover

� Inter-RAT PS handover

� HSDPA handover

� Handover between HSDPA cells

� Handover between HSDPA and DCH


Chapter 1 Soft Handover Counter and KPI Chapter 1 Soft Handover Counter and KPI

Chapter 2 Hard Handover Counter and KPIChapter 2 Hard Handover Counter and KPI

Chapter 3 InterChapter 3 Inter--RAT Handover Counter and KPIRAT Handover Counter and KPI

Chapter 4 HSDPA Handover Counter and KPIChapter 4 HSDPA Handover Counter and KPI


Soft Handover Counter System

� Soft handover procedure

� Measurement report: 1A, 1B,1C, 1D

� Active set update & Active set update complete:

− 1A, 1B,1C



� Soft handover (RNC)

� Attempt: VS.SHO.Att.RNC at point B

� Success: VS.SHO.Succ at point C

� UEs with One RL: VS.SHO.AS.1

� UEs with Two RLs Combined: VS.SHO.AS.2Softer

� UEs with Two RLs Uncombined: VS.SHO.AS.2Soft

� UEs with Three RLs Combined: VS.SHO.AS.3Softer

� UEs with Three RLs and Two of them Combined: VS.SHO.AS.3Soft2Softer

� UEs with Three RLs Uncombined: VS.SHO.AS.3Soft

� Call Drops due to Soft Handover: VS.SHO.Drop.RNC


� Soft handover (Cell)

� Soft handover based on different services

− VS.SHO.AMR.AttOut

− VS.SHO.CS64.AttOut

− VS.SHO.PS64.AttOut



� RL Additions or deletions for Soft Handover

− SHO.AttRLAddUESide at point B SHO.SuccRLAddUESide at point C

− SHO.AttRLDelUESide at point B SHO.SuccRLDelUESide at point C


− VS.SHO.AMR.SuccOut

− VS.SHO.CS64.SuccOut

− VS.SHO.PS64.SuccOut




� Soft handover (Cell)

� Other related counters:

− SHO.FailRLAddUESide.NoReply



Soft Handover KPI

� Soft Handover Success Rate

�Formula

�Measurement scope:

− RNC & Cell

�Description

− This KPI can be used to evaluate the soft handover success Rate

in one RNC or one cell, which includes softer handover.

%100*_mptSHOASUAtte

essSHOASUSuccSRSHO =


Soft Handover KPI

� Soft Handover Success Rate

� Counters (RNC)

− SHOASUAttempt: VS.SHO.Att.RNC

− SHOASUSuccess: VS.SHO.Succ

� Counters (Cell)

− SHOASUAttempt:

▪ SHO.AttRLAddUESide

▪ SHO.AttRLDelUESide

− SHOASUSuccess:

▪ SHO.SuccRLAddUESide

▪ SHO.SuccRLDelUESide


Soft Handover KPI

� Average Active Set Size

�Formula


− RNC

�Description

− This KPI can be used to evaluate the soft handover percentage

%100*3*2*1* 321

++=UE

UEUEUESHR


Soft Handover KPI

� Average Active Size

� Counters

− UE1: VS.SHO.AS.1

− UE2: VS.SHO.AS.2Softer & VS.SHO.AS.2Soft

− UE3: VS.SHO.AS.3Softer, VS.SHO.AS.3Soft & VS.SHO.AS.3Soft2Softer

− UE: VS.SHO.AS.1+ VS.SHO.AS.2Softer+VS.SHO.AS.2Soft+

VS.SHO.AS.3Softer+VS.SHO.AS.3Soft + VS.SHO.AS.3Soft2Softer







Hard Handover Counter System

� Hard handover procedure

� Inter-frequency hard handover

� Intra-frequency hard handover


Inter-frequency Hard Handover Counter System

� Inter-frequency Hard handover (RNC)

� Inter-Frequency Hard Handover Requests: VS.HHO.InterFreq.Att.RNC at point B

� Successful Inter-Frequency Hard Handovers: VS.HHO.InterFreq.Succ.RNC at point C

� Inter-frequency Hard handover (Cell)

� Hard Handover Requests: VS.HHO.InterFreq.AttOut at point B

� Successful Hard Handovers: VS.HHO.InterFreq.SuccOut at point C



� Inter-frequency hard handover execution failure, due to:

� configuration unsupported: VS.HHO.InterFreqOut.CfgUnsupp

� physical channel failure: VS.HHO.InterFreqOut.PyhChFail

� Incompatible simultaneous reconfiguration: VS.HHO.InterFreqOut.FailUSR

� cell update occurred: VS.HHO.InterFreqOut.CellUpdt

� invalid configuration: VS.HHO.InterFreqOut.CfgInvalid



� Inter-frequency Hard handover Failure Analysis (Cell)

� VS.HHO.InterFreqOut.NoReply



� Inter-frequency Hard handover Failure Analysis (Cell)

� Code resource allocation failure: VS.HHO.InterFreqOut.DLCodeRej

� UL admission rejection :VS.HHO.InterFreqOut.ULAdmsnDeny

� DL admission rejected: VS.HHO.InterFreqOut.DLAdmsnDeny


Hard Handover Counter System

� Hard handover (RNC)

� Hard Handover Requests: VS.HHO.Att.RNC at point B

� Successful Hard Handovers: VS.HHO.Succ.RNC at point C

� Hard handover based on different services (Cell)

� VS.HHO.AMR.AttOut

� VS.HHO.CS64.AttOut

� VS.HHO.PS64.AttOut



� VS.HHO.AMR.SuccOut

� VS.HHO.CS64.SuccOut

� VS.HHO.PS64.SuccOut




Inter-frequency hard handover KPI

� Inter-frequency Hard Handover Success Rate

�Formula


− RNC & Cell

�Description

− This KPI can be used to evaluate the inter-frequency hard

handover success Rate in one RNC.

%100_ ×=temptInterHHOAt

ccessInterHHOSuSRInterHHO


Inter-frequency hard handover KPI

� Inter-frequency Hard Handover Success Rate

� Counters (RNC)

− InterHHOAttempt (RNC): VS.HHO.InterFreq.Att.RNC

− InterHHOSuccess (RNC): VS.HHO.InterFreq.Succ.RNC

� Counters (Cell)

− InterHHOAttempt (Cell): VS.HHO.InterFreq.AttOut

− InterHHOSuccess (Cell): VS.HHO.InterFreq.SuccOut







Inter-RAT Handover Counter System

� CS Inter-RAT handover procedure

� CS handover from WCDMA to GSM

� This procedure can be divided into two steps:

− Handover preparation:

▪ From point A to point B

− Handover execution

▪ From point C to point D



� CS Inter-RAT handover counters (RNC)

� Preparation request: VS.SRELOC.AttPrep.IRHOCS at point A

� Preparation success: VS.SRELOC.SuccPrep.IRHOCS at point B

� Execution request: VS.IRATHO.AttCSOut.RNC at point C

� Execution success: VS.IRATHO.SuccCSOut.RNC at point D

� CS Inter-RAT handover counters (Cell)

� Preparation request: IRATHO.AttRelocPrepOutCS at point A

� Preparation success: IRATHO.SuccRelocPrepOutCS at point B

� Execution request: IRATHO.AttOutCS at point C

� Execution success: IRATHO.SuccOutCS at point D



� CS Inter-RAT handover preparation failure (RNC) is due to

� No response for Relocation Required at point A in the figure 1:

VS.SRELOC.Fail.IRATCSOutNRpl

� Failure response for Relocation Required at point A in the figure 2:

VS.SRELOC.FailPrep.IRATCSOut

Figure1 Figure2



� CS Inter-RAT handover execution failure is due to

� Configuration Unsupported :

− VS.IRATHO.FailCSOut.CfgUnRNC (RNC)

− IRATHO.FailOutCS.CfgUnsupp (Cell)

� Physical Channel Failure :

− VS.IRATHO.FailCSOut.PhyFaRNC (RNC)

− IRATHO.FailOutCS.PhyChFail (Cell)



� PS Inter-RAT handover procedure

� PS handover from WCDMA to GPRS

� This procedure can be divided into two steps:

− Handover preparation:

▪ From point A to point B

− Handover execution

▪ From point B to point C



� PS Inter-RAT handover counters (RNC)

� Preparation request: VS.IRATHO.EvalPSOutUTRAN.RNC at point A

� Preparation success and Execution request: VS.IRATHO.AttPSOutUTRAN.RNC at point B

� Execution success: VS.IRATHO.SuccPSOutUTRAN.RNC at point C

� PS Inter-RAT handover counters (Cell)

� Execution request: VS.IRATHO.AttOutPSUTRAN at point B

� Execution success: VS.IRATHO.SuccOutPSUTRAN at point C



� PS Inter-RAT handover failure counters (RNC)

� No response for Cell Change Order from UTRAN, and then no Iu release command

from CN: VS.IRATHO.PSOut.NoReply

� Failure response from UE: VS.IRATHO.PSOut.Fail

− Configuration unacceptable: VS.IRATHO.PSOut.CfgUnsup

− Physical Channel Failure: VS.IRATHO.PSOut.PhyCHFail

− Unspecified: VS.IRATHO.PSOut.Unpec


Inter-RAT Handover KPI

� CS Inter-RAT Handover Preparation Success Rate (WCDMA to GSM)

�Formula


− RNC & Cell

�Description

− This KPI can be used to evaluate the CS inter-RAT preparation

handover success Rate in one RNC

%100*_tPpHOAttempCSInterRAT

sPpHOSuccesCSInterRATSRATPpHOCSInterreR =



� CS Inter-RAT Handover Preparation Success Rate (WCDMA to GSM)

� Counters

− CSInterRATPpHOAttempt:

VS.SRELOC.AttPrep.IRHOCS (RNC)

IRATHO.AttRelocPrepOutCS (Cell)

− CSInterRATPpHOSuccess

VS.SRELOC.SuccPrep.IRHOCS (RNC)

IRATHO.SuccRelocPrepOutCS (Cell)



� CS Inter-RAT Handover Execution Success Rate (WCDMA to GSM)

�Formula


− RNC & Cell

�Description

− This KPI can be used to evaluate the CS inter-RAT handover

success Rate in one RNC

%100*_HOAttemptCSInterRAT

HOSuccessCSInterRATSRHOCSInterRAT =



� CS Inter-RAT Handover Execution Success Rate (WCDMA to GSM)

� Counters

− CSInterRATHOAttempt:

VS.IRATHO.AttCSOut.RNC (RNC)

IRATHO.AttOutCS (Cell)

− CSInterRATHOSuccess

VS.IRATHO.SuccCSOut.RNC (RNC)

IRATHO.SuccOutCS (Cell)



� PS Inter-RAT Handover Preparation Success Rate (WCDMA to GPRS)

�Formula


− RNC

�Description

− This KPI can be used to evaluate the PS inter-RAT handover

prepaRaten success Rate in one RNC

%100_ ×=tOutPpHOAttempPSInterRAT

sOutPpHOSuccesPSInterRATSRPpHOPSInterRAT out



� PS Inter-RAT Handover Preparation Success Rate (WCDMA to GSM)

� Counters

− PSInterRATPpHOAttempt (RNC):

VS.IRATHO.EvalPSOutUTRAN.RNC

− PSInterRATPpHOSuccess (RNC)

VS.IRATHO.AttPSOutUTRAN.RNC



� PS Inter-RAT Handover Execution Success Rate (WCDMA to GPRS)

�Formula


− RNC & Cell

�Description

− This KPI can be used to evaluate the PS inter-RAT handover

success Rate in one RNC, which includes handover out from this

RNC

%100_ ×=utHOAttemptOPSInterRAT

utHOSuccessOPSInterRATSRHOPSInterRAT out



� PS Inter-RAT Handover Execution Success Rate (WCDMA to GSM)

� Counters

− PSInterRATHOAttempt:

VS.IRATHO.AttPSOutUTRAN.RNC (RNC)

IRATHO.AttOutPSUTRAN (Cell)

− PSInterRATHOSuccess:

VS.IRATHO.SuccPSOutUTRAN.RNC (RNC)

IRATHO.SuccOutPSUTRAN (Cell)







HSDPA Handover KPI

� HS-DSCH Service Cell Change Success Rate with SHO

�Formula


− Cell

�Description

− This KPI can be used to evaluate the soft handover success Rate

of HSDPA service in a cell.

%100×=empNumHtoHSHOAtt

cessNumHtoHSHOSuccessRatioHtoHSHOSuc


HSDPA Handover KPI


�Counters

− HtoHSHOAttempNum: VS.HSDPA.CellChg.AttOutIntraRNC

�Measurement point:

− The measurement is triggered at point A as shown in the figure when the RNC

sends a PHYSICAL CHANNLE RECONFIGRATION message to a UE for HSDPA

serving cell change between two intra-frequency cells.

− RNC measures this item in the original cell


HSDPA Handover KPI


�Counters

− HtoHSHOSuccessNum: VS.HSDPA.CellChg.SuccOutIntraRNC


− The measurement is triggered at point B as shown in the figure when the RNC

receives from a UE a PHYSICAL CHANNLE RECFG COMPLETE message

− RNC measures this item in the original cell


HSDPA Handover KPI

� Inter-frequency Hard Handover Success Rate (HSDPA to HSDPA)

�Formula


− RNC

�Description

− This KPI can be used to evaluate the inter-frequency hard

handover success Rate of HSDPA service in a cell

%100×=mHOAttempNuHtoHInterH

umHOSuccessNHtoHInterHatioHOSuccessRHtoHInterH


HSDPA Handover KPI


�Counters

− HtoHInterHHOAttemptNum:

VS.HSDPA.HHO.AttOutIntraRNCInterFreq

� Measurement point:

− The measurement is triggered at point A as shown in the figure.

− When the RNC sends a PHYSICAL CHANNLE RECONFIGRATION message to a

UE for an inter-frequency hard handover from HS-DSCH to HS-DSCH, the RNC

measures this item in the original cell.


HSDPA Handover KPI


�Counters

− HtoHInterHHOSuccessNum:

VS.HSDPA.HHO.SuccOutIntraRNCInterFreq


− The measurement is triggered at point B as shown in the figure.

− When the RNC receives from a UE a PHYSICAL CHANNLE RECFG COMPLETE

message indicating that the handover is an inter-frequency hard handover from HS-

DSCH to HS-DSCH, the RNC measures this item in the original cell


HSDPA Handover KPI

� Channel Handover Success Rate（（（（HSDPA to DCH））））

�Formula


− Cell

�Description

− This KPI can be used to evaluate the channel handover success

Rate when UE handover from HSDPA to DCH in a cell.

%100×=mpNumHtoRHOAtte

essNumHtoRHOSuccessRatioHtoRHOSucc


HSDPA Handover KPI

� Channel Handover Success Rate（（（（HSDPA to

DCH））））

�Counters

− HtoRHOAttempNum:

VS.HSDPA.ChR.HSDSCHtoDCH.Att

�Measurement point:− The measurement is triggered at point A as shown in the figure

− the RNC measures this item in the serving cell when sending a RADIO BEARER RECONFIGURATION message to a UE during a DCCC or RAB MODIFY procedure

− Note : the Transport channels change at the same cell


HSDPA Handover KPI

� Channel Handover Success Rate（（（（HSDPA to DCH））））

�Counters

− HtoRHOSuccessNum:

VS.HSDPA.ChR.HSDSCHtoDCH


− The measurement is triggered at point A1 as shown in the figure

− When the RNC receives RADIO BEARER RECONFIGURATION COMPLETE message from UE, which indicates a handover from HSDSCH to DCH during a

DCCC or RAB MODIFY procedure, the RNC measures this item in a HSDPA cell the UE camps on



HSDPA Handover KPI

� Channel Handover Success Rate（（（（DCH to HSDPA））））

�Formula


− Cell

�Description

− This KPI can be used to evaluate the channel handover success

Rate when UE handover from DCH to HSDPA in a cell.

%100×=mpNumRtoHHOAtte

essNumRtoHHOSuccessRatioRtoHHOSucc


HSDPA Handover KPI


�Counters

− RtoHHOAttempNum:

VS.HSDPA.ChR.DCHtoHSDSCH.Att


− The measurement is triggered at point A as shown in the figure.

− When sending a RADIO BEARER RECONFIGURATION message to a UE during a DCCC or RAB MODIFY procedure , the RNC measures this item in the serving cell

of the HSDPA service based on the transport channels the UE occupies before and after the reconfiguration.



HSDPA Handover KPI


�Counters

− RtoHHOSuccessNum:

VS.HSDPA.ChR.DCHtoHSDSCH


− The measurement is triggered at point A1 as shown in the figure

− When receiving RADIO BEARER RECONFIGURATION COMPLETE message from UE, which indicating a handover from DCH to HSDSCH during a DCCC or

RAB MODIFY procedure at the same cell, RNC measures this item in a HSDPA

cell the UE camps on.


HSDPA Handover KPI

� HSDPA Inter-RAT Handover Success Rate (WCDMA to GPRS )

�Formula


− Cell

�Description

− This KPI can be used to evaluate the HSDPA inter-RAT handover

success Rate in one cell, from WCDMA to GPRS

%100_ ×=ptRATHOAttemHSDPAInter

ssRATHOSucceHSDPAInterSRRATHOHSDPAInter


HSDPA Handover KPI


� Counters

− HSDPAInterRATHOAttempt:

VS.IRATHO.HSDPA.AttOutPSUTRAN


− The measurement is triggered at point B as shown in the figure

− When RNC sends the CELL CHANGE

ORDER FROM UTRAN message to UE dut to HSDPA inter-RAT outgoing

handover, the measurement is triggered in

the original cell


HSDPA Handover KPI


� Counters

− HSDPAInterRATHOSuccess:

VS.IRATHO.HSDPA.SuccOutPSUTRAN


− The measurement is triggered at point D as shown in the figure

− When RNC sends Iu Release Complete

to CN due to HSDPA handover, the measurement is triggered in the original

cell.


Other Mobility KPI

� Numbers of Soft Handovers Decided for Different Traffic

Classes (Cell)

� VS.SHO.service.AttOut, VS.SHO.service.SuccOut

� Notes: Service could be AMR, CS64, PS64, PS128, PS144, PS384

� Number of SHO Event Measurement Reports (Cell)

� VS.RRC.MrRpt.1x

� VS.RRC.MrRpt.1A. Detect

� Notes:1x could be 1A, 1B, 1C or 1D

� Numbers of Requested Outgoing Hard Handovers by Different

Traffic Classes (Cell)

� VS.HHO.service.AttOut, VS.HHO.service.SuccOut

� Notes: Service could be AMR, CS64, PS64, PS128, PS144, PS384

Other related CountersOther related Counters


Summary

� This slide introduces WCDMA mobility KPI and

related counters:

�Soft handover counter and KPI

�Hard handover counter and KPI

� Inter-RAT handover counter and KPI

�HSDPA handover counter and KPI

SummarySummary

Thank youwww.huawei.com

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Huawei WCDMA Radio Network Mobility Counter and KPI

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